We are pleased to announce that we are fully restocked of the Outdoor Probe Thermocouple.  In this year's new production batch, we updated the local memory hardware to the same non-volatile memory already production proven in our External Power Sensor.  This prevents loss of recorded temperature data when battery is removed during local recording or even during data upload. 

Unlike Outdoor Probe Basic, the thermocouple version contains high quality 16-bit internal temperature sensor from Texas Instruments, which not only provides "cold junction compensation" needed to read K-type thermocouple, but also an ambient temperature data stream when either the DS18B20 probe or k-type is attached, or when no probe is attached at all. 

K-type thermocouples allow logging and monitoring of -70°C and colder freezer, oven or dishwasher (e.g. 250°F and up) whose temperature would exceed the lower (-55°C) or upper (125°C) end of a regular DS18B20 probe. We have linked available low and high temperature K-type thermocouples in the product page. 

We are shipping Outdoor Probes with updated firmware that fixes an issue that affects some units when used with DS18B20 probes inside freezer environment (-20°C/0°F). This environment causes battery internal resistance to increase which causes 1) false triggering of brown-out reset circuit intended to prevent flash memory/firmware corruption, this causes battery to die prematurely, 2) marginal timing in Maxim 1-wire communication with DS18B20 probe, causing glitches in reported temperature. 

To valid this fix, we have been running eight Outdoor Probes with DS18B20, some of which are customer returns that experienced these problems,  inside a -20°C freezer at ~1 min record interval. Click here to view the live temperature data from these 8 probes. You should not see any glitch or missing data from around May 4.  

If you have received Outdoor Probe and are experiencing these problems when used inside freezer, please create a support ticket to request firmware update (the board needs to be sent back, we will email you a prepaid return shipping label).